Just drink to thirst. There is some evidence that forcing yourself to drink too much is bad for your health and may be bad for breastfeeding. It's good to keep water near where you breastfeed so if you start to feel thirsty you aren't trapped nursing for half an hour thirsting to death.
Virtually all women around the world can breastfeed their babies. The World Health Organization estimates between 95-98%. That includes women who live in disasters like Haiti, women starving in Africa, women that have to walk a mile to carry unsafe water for their family to drink.
You don't need to worry about being 'able to maintain a good milk flow'. Breastfeed withing the first hour after birth, feed 8-12 times a day on demand, don't give any bottles or pacifiers and breastfeeding should be easy. If you have an epidural be prepared to have engorged breasts from the IV fluids you have been given.
www.kellymom.com is a good website
at 8:26 AM on Feb. 7, 2010